Improvement in heating-drums



G. H. PEDLAR. Heating-Drums.

C? Inventar. P i

UNITED STATES PATENT OFFICE GEORGE H. PEDLAR, OF OSHAWA, CANADA, ASSIGNOR TO SAMUEL PEDLAIU,

OF SAME PLACE.

IMPROVEMENT IN HEATING-DRUMS.

Specification forming part of Letters Patent No. 148,978, dated March 24, 1874 application filed May 17, 1873.

To all whom it may concern:

Beit known that I, GEORGE H. PEDLAR, of Oshawa, in the Province of Ontario and Dominion of Canada, have invented a new and useful Improvement in Heaters, of which the following is a specication:

My invention relates to hot-air drums, which may be applied to stoves or stove-pipes; and the particular feature of invention claimed herein consists of a separate base-plate, having an encircling rim or ange to support and embrace the lower end of the inner drum, a concave bottom, and a single horn flue for cold air, Haring upward from the bottom of the drum, and entering the separate concave base, with which it is integral; the object being to obtain a cheap and durable drum, in which the parts may be put together without trouble, on account of the simplicity in its construction, in having the more difficult parts in a single base and constituting the seat for the inner drum, and into which the cold-air flue enters, thus dispensing with much labor, and having the important advantage of forming a perfect and permanent air-joint at the point most exposed to the heated products and the cold air, whereby the air for inhalation is kept pure and free from gases, which, in ordinary sheet-iron jointed drums, is quite impossible, by reason of the impracticability of making durable air-tight joints with sheet-iron; the chief object of my invention being to obtain a base for the air-drum that is not likely to be warped and twisted by heat, thereby opening its connecting-joints and damaging the heated air.

In the accompanying drawing, Figure 1 represents a vertical section of the heater, taken on the line .c of Fig. 2. Fig. 2 is a horizontal section of Fig. 1, taken on the line 3/ y.

Similar letters of reference indicate corresponding parts.

A is the outer cylinder or casing. B is an inner cylinder, of less diameter, which is arranged within the outer casing, as seen in the drawing. C represents the base of this cylinder, whlch is concave in form, and preferably made of cast-iron, with a hanging air-tube, D, of any desired form and size. The cylinder B is, of course, made of sheet-iron, and the two are joined together by riveting, or in any suitable manner. E is the bottom of the heater, through which the air-tube D passes. F is an opening in the bottom, which allows the drum to be placed over the smoke-flue collar of a stove, or over the end of the stove pipe when the drum is used in an upper room, with 'the stove below. M is a chamber, into which the heat is received, and from which it ascends through the annular ue.

The heated products of combustion impinge against the concave base C, which absorbs a large portion of the heat; but the smoke and gaseous products of combustion are spread by the concave base, and pass upward through the annular flue G, between the outer and inner cylinders, and iinds an exit through the pipe H in the annular cap I of the heater.

J J are rods, which pass through the annular cap I, with knobs K K on their upper ends, Aand having delecting-plates L L on their lower ends. These plates are segments of circles which, in width, nearly ll the annu lar flue G, and of a length sufficient to inclose about one-fourth of the surface of the inner cylinder each, as seen in Fig. 2. These plates 'deilect and retard the gaseous products of combustion as they ascend, and thereby allow an increased quantity to be absorbed by the air-cylinder B. These plates also serve to clear the cylinder B of the soot and foreign matter which adheres to it, by means of a vertical movement which is given them by means of the rods. r

The cold-air tube D may, by means of a pipe, receive air from the outside of the build- I do not confine myself to any particular the drum, andpro'vided Witha single upwardform, size, or proportions. aring horn, D, integral with the base and its Having thus described my invention, I claim joint-rim, and a support, N, as shown and deas new and desire to secure by Letters Patscribed, and to obtain the advantages stated.

ent- G. H. PEDLAR.

The separate concave base-plate G, as a seat Witnesses:

for the inner drum B, and having a vertical J. E. HA'WKINS,

collar, rim, or ange, a, to close the joint of Jos. HOARD. 

